16 results about "Phased array feed" patented technology

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The invention relates to an expandable rotating paraboloid double-reflector system SAR (Synthetic Aperture Radar) antenna, belongs to the technical field of spacecraft antennas, and solves the technical problems that the expandable rotating paraboloid double-reflector system SAR antenna is large in folding envelope and low in profile precision. The SAR antenna comprises a reflector and a phased array feed source device, the reflector comprises a main reflector body, an auxiliary reflector body and a conical force bearing barrel, the main reflector body is of a rotating paraboloid structure after being unfolded, the auxiliary reflector body is located on the inner side of the rotating paraboloid structure and connected with the main reflector body through the conical force bearing barrel, and the conical force bearing barrel is connected with the main reflector body. The phased array feed source device is arranged in the conical force bearing barrel, the phased array feed source device comprises a horn radiation unit, a T / R assembly and a heat conduction table, the cross section of the heat conduction table is of an axial symmetry structure shaped like a Chinese character'ji ', and the phased array feed source device is fixedly connected with an upper cabin plate of a load cabin of a satellite through the bottom face of a heat conduction table unit. The SAR antenna is high in precision, small in size, good in heat dissipation effect and high in stability.

This invention discloses a high-precision assembly device and precision measurement method for a parabolic cylindrical SAR antenna, belonging to the field of spacecraft structure technology. The device includes a worktable (10), a high-precision conformal fixture (5) for fixing the parabolic cylindrical reflector (2), a cabin fixture frame (4) for installing the satellite cabin (3), and first, second, third, and fourth moving adjustment mechanisms (6, 7, 8, 9) arranged in parallel. The fixed end of the moving adjustment mechanism is connected to the worktable, and the adjusting end is connected to the cabin fixture frame (4) through a ball joint bearing. Each moving adjustment mechanism has X-axis, Y-axis, and Z-axis moving adjustment functions. Through the synchronous or asynchronous adjustment of the four mechanisms, the satellite cabin (3) is driven to drive the phased array feed (1) to achieve six-degree-of-freedom precision fine-tuning. This invention realizes high-precision assembly and adjustment of the parabolic cylindrical antenna, with the characteristics of multiple degrees of freedom of adjustment, efficient data fusion, and high assembly accuracy.

The application provides a method and device for measuring and correcting antenna pointing deviation and sub-reflector servo error. The method comprises: obtaining focal plane field data by using a phased array feed placed on an antenna focal plane; determining an antenna aperture field corresponding to the current antenna pointing deviation and sub-reflector servo error according to the focal plane field data; obtaining pointing deviation and sub-reflector servo error information of the current antenna according to the antenna aperture field; and when any one of the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value is greater than or equal to the corresponding preset value, performing correction processing according to the pointing deviation and sub-reflector servo error information of the current antenna until the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value corresponding to the corrected pointing deviation and sub-reflector servo error information are all less than the corresponding preset value.

The application discloses a method for correcting deflection of an antenna radiation beam under a radome based on time reversal, and belongs to the technical field of radars. The method is used for processing signals received by each array element in an array antenna by using the time reversal method, and re-emitting the processed time reversal signals from the corresponding array element, so that more accurate beam pointing is achieved, and the aiming error is reduced. Based on the time reversal technology, the application can realize the effect of adaptive direction backtracking, and ensure that the target angle has the maximum gain under the target frequency; compared with a traditional phased array feeding method under the radome, the method has a better aiming error index.

The invention relates to a satellite with an expansion type SAR antenna, belongs to the technical field of spacecraft antennas, and solves the technical problem that the satellite with the expansion type SAR antenna is low in structural stability. The satellite comprises a satellite platform, an energy system and an expansion type SAR antenna, the satellite platform comprises a containing space defined by an upper cabin plate, a bottom plate and side plates, symmetrical supporting plates are further arranged in the containing space, and the supporting plates are connected with the upper cabin plate, the bottom plate and the side plates; the energy system comprises a solar array, and the solar array is arranged on the side plate; the expansion type SAR antenna comprises a phased array feed source device and a reflector, the upper space of the containing space is a load cabin, and the phased array feed source device and the reflector are fixedly installed on the upper cabin plate of the load cabin. The satellite with the expansion type SAR antenna has good structural stability.

The invention discloses an interference type passive microwave imaging system based on a multi-beam feed reflector antenna, the system comprises an interference array and a processing unit, the interference array comprises P multi-beam feed reflector antenna forming arrays, each multi-beam feed reflecting surface antenna comprises a reflecting surface for reflecting and focusing microwave signals and a phase control feed source array for receiving the microwave signals reflected and focused by the reflecting surface; the phased feed source array comprises M unit antennas, and the M unit antennas are divided into N phased array feed source clusters; each phased array feed source cluster receives a microwave signal with a set direction; and the processing unit is used for performing correlation operation on microwave signals of the phased array feed source clusters with the same pointing direction of the P multi-beam feed reflector antennas to form interference type passive microwave imaging of the pointing direction. According to the invention, the number of interference units and the interference operation scale of the high-resolution passive microwave imaging system are reduced, the sensitivity of the high-resolution passive microwave imaging system is improved, and the imaging field of view is expanded.

HPEM effector antenna (1), having the following features: The HPEM effector antenna (1) comprises a metamaterial-based reflector array (2) arranged on the outside at a distance from an inner phased-array feed array (3), The metamaterial-based reflector array (2) has switchable reflector array elements (21) with the switching states transmitting or reflecting in order to achieve a high emission intensity for a given direction, The phased-array feed array (3) has switchable feed array elements (31) with the switching states transmitting or non-transmitting in order to selectively irradiate reflector array elements in order to achieve a high radiation intensity for a given direction.

The invention provides a phased array feed source system, which is characterized in that a dual-polarization feed source array in the system is formed by arranging N * M array element arrays, and a radiation patch in each array element comprises a slot structure which is in 90-degree rotational symmetry along the center of the radiation patch; the first feed port and the second feed port are located in the length direction of the first vertical slot, and the direction of the first feed port relative to the center of the radiation patch is orthogonal to the direction of the second feed port relative to the center of the radiation patch; the back of each array element is connected with a transceiver module, a first digital phase shifter and a first digital attenuator form a first output end and are connected with a first feed port, and a second digital phase shifter and a second digital attenuator form a second output end and are connected with a second feed port; the digital signal processing and control unit is configured to receive a task instruction, calculate an excitation signal and send a control instruction to the transceiver module array. The phased array feed source system has the advantages of high flexibility, high integration level, high precision and the like.

The application discloses a light and small super-high resolution wide-width spaceborne SAR system, which comprises a signal processor, a frequency synthesizer, a transmitting channel, a multi-channel receiving channel, a multi-channel internal scaler, a power supply and distribution unit, a beam forming network, a phased array feed and a parasol reflector; the light and small parasol reflector antenna combined with the phased array feed is used in a multi-channel multi-beam receiving mode to realize beam scanning receiving in the distance direction; and the whole surveying and mapping band is covered by switching different channels to receive. The system has the advantages of light weight, small size, low power consumption and low heat consumption, the imaging resolution can reach the centimeter level, the action distance is in the kilometer level, and the system has great significance for high-resolution earth observation.